Any transformer that offers an XQJ API implementation can be used when validating
XQuery or transforming XML documents. (An example of an XQuery engine that implements the XQJ
API is Zorba.
In case your XQJ Implementation is native, make sure the directory containing the
native libraries of the engine is added to your system environment variables: to
PATH - on Windows, to LD_LIBRARY_PATH - on Linux,
or to DYLD_LIBRARY_PATH - on OS X. Restart Oxygen XML Developer after
configuring the environment variables.